-- This interface is meant for casual browsing (e.g., from SQLPlus)

-- vs. the programmatic OPEN / FETCH / CLOSE interfaces above.

-- PARAMETERS:

-- object_type - The type of object to be retrieved.

-- name - Name of the object.

-- schema - Schema containing the object. Defaults to

-- the caller's schema.

-- version - The version of the objects' metadata.

-- model - The object model for the metadata.

-- transform. - XSL-T transform. to be applied.

-- RETURNS: Metadata for the object transformed to DDL as a CLOB.

FUNCTION get_ddl ( object_type IN VARCHAR2,

name IN VARCHAR2,

schema IN VARCHAR2 DEFAULT NULL,

version IN VARCHAR2 DEFAULT 'COMPATIBLE',

model IN VARCHAR2 DEFAULT 'ORACLE',

transform. IN VARCHAR2 DEFAULT 'DDL') RETURN CLOB;

1.得到一個(gè)表或索引的ddl語句

SELECT DBMS_METADATA.GET_DDL('TABLE','DEPT','SCOTT') FROM DUAL;

select dbms_metadata.get_ddl('INDEX','PK_DEPT','SCOTT') from dual;

2.得到一個(gè)用戶下的所有表，索引，存儲(chǔ)過程的ddl

SELECT DBMS_METADATA.GET_DDL(U.OBJECT_TYPE, u.object_name)
FROM USER_OBJECTS u
where U.OBJECT_TYPE IN ('TABLE','INDEX','PROCEDURE');

3.得到所有表空間的ddl語句

SELECT DBMS_METADATA.GET_DDL('TABLESPACE', TS.tablespace_name)
FROM DBA_TABLESPACES TS;

4.得到所有創(chuàng)建用戶的ddl

SELECT DBMS_METADATA.GET_DDL('USER',U.username)
FROM DBA_USERS U;

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9i  中可以利用DBMS_METADATA.GET_DDL包得到數(shù)據(jù)庫(kù)的對(duì)象的ddl腳本。如下（SQLPLUS中執(zhí)行）：